<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>权限管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图区域 -->
        <el-card>
            <!-- 添加角色区域 -->
            <el-row>
                <el-col>
                    <el-button type="primary">添加角色</el-button>
                </el-col>
            </el-row>
            <!-- 角色列表 -->
            <el-table :data="rolesList" stripe border>
              <!-- 展开列 -->
              <el-table-column type="expand" >
                  <template slot-scope="scope">
                      <el-row :class="['bdbtm', i1===0?'bdtop':'', 'vcenter']" v-for="(item1,i1) in scope.row.children" :key="item1.id">
                          <!-- 一级权限 -->
                          <el-col :span="5">
                              <el-tag closable @close="delRightById(scope.row,item1.id)">{{item1.authName}}</el-tag>
                              <i class="el-icon-caret-right"></i>
                          </el-col>
                          <!-- 二、三级权限 -->
                          <el-col :span="19">
                              <el-row :class="[i2===0?'':'bdbtm', 'vcenter']" v-for="(item2,i2) in item1.children" :key="item2.id">
                                  <!-- 二级权限 -->
                                  <el-col :span="6">
                                    <el-tag closable type="success" @close="delRightById(scope.row,item2.id)">{{item2.authName}}</el-tag>
                                    <i class="el-icon-caret-right"></i>
                                  </el-col>
                                  <!-- 三级权限 -->
                                  <el-col :span="18">
                                    <el-tag type="warning" v-for="(item3) in item2.children" :key="item3.id" closable @close="delRightById(scope.row,item3.id)">{{item3.authName}}</el-tag>
                                  </el-col>
                              </el-row>
                          </el-col>
                      </el-row>
                      <!-- <pre>
                      {{scope.row}}
                      </pre> -->
                  </template>
              </el-table-column>
              <!-- 索引列 -->
              <el-table-column type="index" ></el-table-column>
              <el-table-column prop="roleName" label="角色名称"></el-table-column>
              <el-table-column prop="roleDesc" label="角色描述"></el-table-column>
              <el-table-column label="操作" width="300px">
                <template slot-scope="scope">
                    <!-- 编辑 -->
                    <el-button type="primary" icon="el-icon-edit" size="mini" @click="editRoleDialog(scope.row.id)">编辑</el-button>
                    <!-- 删除 -->
                    <el-button type="danger" icon="el-icon-delete" size="mini" @click="delRoleById(scope.row.id)">删除</el-button>
                    <!-- 分配权限 -->
                    <el-tooltip content="分配权限" placement="top-end" :enterable="false">
                        <el-button type="warning" icon="el-icon-setting" size="mini" @click="showRightDialog(scope.row)" >分配权限</el-button>
                    </el-tooltip>
                </template>
              </el-table-column>
            </el-table>
            <!-- 分配权限对话框 -->
            <el-dialog
            title="分配权限"
            :visible.sync="rightsDialogVisible"
            width="50%" @close="closeRightDialog">
            <el-tree :data="rightsList" :props="treeProps" ref="treeRef" show-checkbox default-expand-all :default-checked-keys="defKeys" node-key="id"></el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="rightsDialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="allotRights">确 定</el-button>
            </span>
            </el-dialog>
        </el-card>
    </div>
</template>
<script>
export default {
  data() {
    return {
      rolesList: [],
      rightsDialogVisible: false,
      rightsList: [],
      // 树形控件的属性绑定对象
      treeProps: {
        label: 'authName',
        children: 'children'
      },
      // 默认选中的节点Id值数组
      defKeys: [],
      // 当前即将分配权限的角色id
      roleId: ''
    }
  },
  // 获取所有角色
  created() {
    this.getRolesList()
  },
  methods: {
    // 获取角色列表
    async getRolesList() {
      const { data: res } = await this.$http.get('roles')
      // console.log(res)
      if (res.meta.status !== 200) {
        return this.$message.error('获取角色失败')
      }
      this.rolesList = res.data
      // console.log(this.rolesList)
      this.$message.success('获取角色成功')
    },
    // 根据id删除对应的权限
    async delRightById(role, rightId) {
      const confirmResult = await this.$confirm('此操作将永久删除该权限, 是否继续?', '提示', {
        confirmButtonText: '确定',
        cancelButtonText: '取消',
        type: 'warning'
      }).catch(err => err)
      console.log(confirmResult)
      if (confirmResult !== 'confirm') {
        return this.$message.info('已取消删除')
      }
      // 删除权限成功
      const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
      if (res.meta.status !== 200) {
        return this.$message.error('删除权限失败！')
      }
      this.$message.success('删除权限成功！')
      // this.getRolesList()返回的data, 是当前角色下最新的权限数据,无需重新刷新列表
      role.children = res.data
    },
    // 打开分配权限对话框
    async showRightDialog(role) {
      const { data: res } = await this.$http.get(`rights/tree`)
      this.roleId = role.id
      if (res.meta.status !== 200) {
        return this.$message.error('获取权限失败')
      }
      this.rightsList = res.data
      console.log(this.rightsList)
      // 递归获取三级节点的id
      this.getLeafKeys(role, this.defKeys)
      this.rightsDialogVisible = true
    },
    // 通过递归形式获取角色下所有三级权限的id，并保存到defKeys数组中
    getLeafKeys(node, arr) {
      // 如果当前node节点不包含children属性，则是三级节点，将节点id添加到arr中
      if (!node.children) {
        return arr.push(node.id)
      }
      node.children.forEach(item => this.getLeafKeys(item, arr))
    },
    // 关闭权限对话框
    closeRightDialog() {
      this.defKeys = []
    },
    // 点击为角色分配权限
    async allotRights() {
      const keys = [
        ...this.$refs.treeRef.getCheckedKeys(),
        ...this.$refs.treeRef.getHalfCheckedKeys()
      ]
      // console.log(keys)
      const idStr = keys.join(',')
      const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
      // console.log(res)
      if (res.meta.status !== 200) return this.$message.error('分配权限失败')
      this.$message.success('分配权限成功')
      this.getRolesList()
      this.rightsDialogVisible = false
    }
  }
}
</script>
<style lang="scss" scoped>
.el-tag{
    margin: 7px;
}
.bdtop{
    border-top: 1px solid #eee
}
.bdbtm{
    border-bottom: 1px solid #eee
}
.vcenter{
    display: flex;
    align-items: center
}
</style>
